BD4201FV Rohm, BD4201FV Datasheet

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BD4201FV

Manufacturer Part Number
BD4201FV
Description
Battery Backup IC
Manufacturer
Rohm
Datasheet
Regulators
Battery Backup IC
BD4201FV
BD4201FV is a battery backup IC. Switch that detect battery voltage and switch into back up power supply and
3-channel regulator are incorporated into a single chip.
Current consumption is 15µA (Max.). This IC is perfect for portable appliances.
Portable video, Digital camera
1) Low quiescent current
2) 3 high accurate voltage regulators
3) Low dropout voltage, and high accurate voltage
4) Control circuit; Backup
5) Special sequence;
Main power supply input Voltage
Back up power supply input Voltage
CS output Voltage
RESRT output Voltage
Power dissipation
Operating temperature
Storage temperature
70mm 70mm 1.6mm Glass fiber basis subtract 3.5mW / C when over 25 C
Features
Applications
Absolute maximum ratings (Ta=25°C)
Commendable operating status (Ta=25°C)
Power supply range
Backup power supply range
Load current range1
Load current range2
Load current range3
detectors (CS, RESET)
Normal operation < 15.0µA Max.
Backup mode < 2.1µA Max.
For shifting to the backup mode. It need to make
main battery over +Vdet1 once.
Parameter
Parameter
Symbol
Symbol
VRES
Vbat
Vbat
Iout
Topr
Tstg
Vin
Vcs
Ich
Iro
Vin
Pd
Min.
2.0
2.0
0
0
0
40 to 125
30 to 85
Limits
Typ.
350
15
15
15
15
-
-
-
-
-
External dimensions (Unit : mm)
Max.
15.0
15.0
20.0
60.0
20.0
(0.52)
Unit
Unit
mW
mA
mA
mA
SSOP-B8
V
V
V
V
V
V
C
C
3.0 0.2
1
8
0.65
4
5
0.22 0.1
0.1
0.15 0.1
BD4201FV
1/8

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BD4201FV Summary of contents

Page 1

... Regulators Battery Backup IC BD4201FV BD4201FV is a battery backup IC. Switch that detect battery voltage and switch into back up power supply and 3-channel regulator are incorporated into a single chip. Current consumption is 15µA (Max.). This IC is perfect for portable appliances. Applications Portable video, Digital camera ...

Page 2

... Regulators Block diagram Fig. 1 BD4201FV 2/8 ...

Page 3

... Vin Main power supply input Pin Vin Function Pin No. Pin Name 2 Vch 4 CS input Pin CS 6 Vout Vout 8 Vro Vro BD4201FV Function Regulator 3 output Pin Vch Vin CS voltage detector output Pin Regulator2 output Pin Vin Vbat Regulator1 output Pin Vin Vin 3/8 ...

Page 4

... A 0.1 A 2.822 2.89 2.958 V 2.79 2.85 2. BD4201FV Conditions Vin=3.6V No load Vin=3.6V Vbat=3V No load Vin : Open Vbat=3V No load Vin=7.2V, lro=3mA lro=3mA Vin=7.2V, lro=100 A 20mA Vin=4 10V, lro=3mA Vin=7.2V, lout=23mA lout=23mA Vin=7.2V, lout=100 A 60mA Vin=4 10V, lout=23mA Vin=7.2V, lch=3mA lch=3mA Vin=7.2, Ich=100 A 20mA ...

Page 5

... CS 4 0.01 F Vss 1 Vro 2 Vch Vin Vbat 3 Vout CS 4 RESET V V2 Fig.2 Vss Vro 8 Vch 7 Vin Vbat 6 Vout CS 5 RESET Fig.3 BD4201FV 8 SW7 SW6 Iro SW5 Iout SW4 I4 Vro ...

Page 6

... Parasitic diodes can occur inevitably in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits as well as operation faults and physical damage. Accordingly, Please do not use methods by which parasitic diode operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin. OUTPUT PIN BD4201FV 6/8 ...

Page 7

... A) parasitic diode GND Pin layout Vss 1 Vch 2 Vbat (Pin Parasitic diode or transistor (Pin B) Fig.4 Simplified structure of IC Fig. 5 BD4201FV Transistor (NPN GND P substrate C B GND Parasitic diode or transistor Vro 8 Vin 7 Vout 6 5 RESET ...

Page 8

... Regulators Electrical characteristic curves (mW) 500 400 300 200 100 100 Temperature Fig.6 Power dissipation curve BD4201FV 125 150 ( C) 8/8 ...

Page 9

... Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any ...

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